[CW] Autek MK-1 Keyer Memory Expansion

[Bob Wade]

Hi List Members,
Does anyone have a schematic or information on the Memory Expansion to 
the Autek MK-1 Keyer? I have the manual and schematics for the basic 
keyer, but nothing on the memory expansion.  I have acquired one with 
some parts missing in the expansion area. It appears that the original 
2102 static memory chip is removed and a small pc board is connected to 
the 2102 socket.  On the small pc board is a MM5257N 4K x 1 memory chip. 
Another chip goes in the socket that connects to where the 2102 was. 
This chip is missing (whatever it was). Also I am not sure if there were 
any mods to the original base pc board for this expansion.  Any help 
would be greatly appreciated. This is a great keyer.
As an aside, any hams in the Riverside, CA area - I will be starting a 
"Learn Morse Code" class on a 2 meter simplex frequency in a couple 
weeks.  Join in if you wish.  I believe the frequency (unless objection) 
will be 145.520 MHz on Wednesday evenings at 19:30 or 20:00 PDST.  There 
is a voice net that starts at 20:30.  I am awaiting the Technicians that 
have shown interest to select the starting time.  Contact me if interested.
Thanks es 73,
 
  Bob Wade - W6RTW
 Riverside County RACES PEOC Station Manager
 w6rtw at arrl.net
 bobwade at earthlink.net
 http://home.earthlink.net/~w6rtw   (web site)